Chewing gum, once bought primarily by adolescent boys, is now featured in commercials as a breath freshener and teeth cleanser for use after a meal.

曾经主要由青少年购买的口香糖，现在在广告中被用作饭后的口气清新剂和牙齿清洁剂。

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Lemon is known to have been used by the Romans as a treatment for stomach upsets and also as a breath freshener. The British Navy have also used it in the past to aid the prevention of scurvy.

柠檬曾被罗马人用来治疗消化不良和用作空气清新剂，过去英国海军曾用柠檬预防坏血病。

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Unlike Asian consumers, Americans still see gum mainly as a breath freshener.

ECONOMIST: Medical confectionery